CN100483491C - Driving method of plasma display panel - Google Patents

Driving method of plasma display panel Download PDF

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Publication number
CN100483491C
CN100483491C CNB2005101158140A CN200510115814A CN100483491C CN 100483491 C CN100483491 C CN 100483491C CN B2005101158140 A CNB2005101158140 A CN B2005101158140A CN 200510115814 A CN200510115814 A CN 200510115814A CN 100483491 C CN100483491 C CN 100483491C
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China
Prior art keywords
voltage
keep
pulse
driving method
keeping
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CNB2005101158140A
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CN1773582A (en
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仓承佑
金雨镇
尹致暎
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2944—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by varying the frequency of sustain pulses or the number of sustain pulses proportionally in each subfield of the whole frame
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/292—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for reset discharge, priming discharge or erase discharge occurring in a phase other than addressing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2942—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge with special waveforms to increase luminous efficiency
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Abstract

A driving method of a plasma display panel in which scan electrode lines and sustain electrode lines are parallel to each other and address electrode lines are spaced from and intersect the scan electrode lines and the sustain electrode lines, includes temporally dividing a unit frame into a plurality of subfields, generating a driving signal having a reset period, an address period, and a sustain period for each subfield, detecting an average signal level for the unit frame, alternately applying a first sustain pulse to the scan electrode lines and a second sustain pulse to the sustain electrode lines, wherein each of the first sustain pulse and the second sustain pulse reaches a first voltage with a rising slope and reaches a ground voltage with a falling slope, and controlling a timing of alternately applying in accordance with the average signal level for the unit frame.

Description

Driving method of plasma display panel
Technical field
The present invention relates to driving method of plasma display panel, more particularly, the present invention relates to a kind of during keeping, detect average signal level and apply according to average signal level overlappingly keep pulse or non-overlappedly keep pulse and improve discharging efficiency, prolong panel serviceable life and reduce the driving method of plasma display panel of operating temperature.
Background technology
Conventional plasma display comprises address electrode lines, preceding dielectric layer and back dielectric layer, scanning electrode wire, keeps magnesium oxide (MgO) protective seam between electrode wires, fluorescence coating, barrier and prebasal plate and the metacoxal plate.
Address electrode lines is formed on the metacoxal plate with preassigned pattern.Back dielectric layer is formed on the address electrode lines.Barrier is formed on the dielectric layer of back along the direction that is parallel to address electrode lines.Barrier limits the discharge space of each arc chamber and avoids optical interference between the arc chamber.Fluorescence coating is formed on the back dielectric layer on the address electrode lines between the barrier.Fluorescence coating comprises red fluorescence coating, green fluorescence layer and the blue fluorescence coating that is disposed in order.
Keep electrode wires and scanning electrode wire and be formed on the prebasal plate, to intersect with address electrode lines with preassigned pattern.Common factor separately limits corresponding display room.Separately keep electrode wires and scanning electrode wire separately can have by the transparent electrode lines of making such as ITO transparent conductive materials such as (tin indium oxides) and be used to improve electric conductivity such as metal electrode lines such as bus electrodes.Preceding dielectric layer is formed, and keeps electrode wires and scanning electrode wire with covering.The protective seam that is used to protect panel to avoid the highfield interference forms on the dielectric layer before whole.The gas that is used to form plasma is encapsulated in the discharge space.
In order to drive conventional plasma display, subdomain comprises reset period, address period and keeps the phase, and drive signal is applied to address electrode lines, keeps electrode wires and scanning electrode wire.
At first, at reseting period, reset pulse is applied to all scanning electrode wires and carries out reset discharge, thus the wall electric charge in all arc chambers of initialization.
Secondly, in address period, in order to select arc chamber, scanning impulse is applied to scanning electrode wire in proper order, and display data signal is applied to the address electrode lines of the chamber of selection.
Once more, during keeping, keep discharge, keep pulse and alternately be applied to and keep electrode wires and scanning electrode wire in order to make to carry out in the chamber that address period is selected.
Yet being applied to scanning electrode wire and keeping the pulse of keeping that having of electrode wires keep sparking voltage in the phase of keeping can be not overlapping in time.In other words, be applied to the there be the non-overlapped pulse of keeping.As a result, recur the frequency of keeping discharge and descend, cause the prolongation of the phase of keeping or the reduction of discharging efficiency.
Summary of the invention
Therefore the present invention is devoted to a kind of method that drives plasma display, and it can overcome the one or more problems that cause owing to the limitation of prior art and shortcoming substantially.
A feature of the embodiment of the invention provides a kind of driving method of plasma display panel that improves discharging efficiency.
Another feature of the embodiment of the invention provides a kind of panel driving method of plasma display panel in serviceable life that prolongs.
The another feature of the embodiment of the invention provides a kind of driving method of plasma display panel that reduces the panel working temperature.
A feature again of the embodiment of the invention is to detect average signal level during keeping, and applies according to this average signal level and overlappingly to keep pulse or non-overlappedly to keep pulse.
By providing a kind of driving method of plasma display panel can realize at least one above and other feature and advantage of the present invention, in this plasma display panel, scanning electrode wire and to keep electrode wires parallel to each other, and address electrode lines is by with this scanning electrode wire with keep electrode wires and separate and intersect, and this method comprises: unit frame is divided into a plurality of subdomains in time; For each subdomain produce have reseting period, address period and keep during drive signal; Detect the average signal level of described unit frame; Alternately keep pulse with first and be applied to scanning electrode wire and second and keep pulse and be applied to and keep electrode wires, wherein each described first is kept pulse and second and keeps pulse and all reach first voltage with the rate of rise, and reaches ground voltage with descending slope; And the sequential that alternately applies according to the control of the average signal level of this unit frame.
When this average signal level during, control this sequential and can be included in described first and keep pulse and second and keep and have described first voltage in the pulse simultaneously less than predetermined value.Control this sequential and can comprise when this scanning electrode wire and keep in the electrode wires one when reaching first voltage, keep pulse with described second and be applied to this scanning electrode wire and keep in the electrode wires another.When this average signal level is equal to or greater than described predetermined value, controls this sequential and can be included in described first and keep pulse and second and keep and do not have described first voltage in the pulse simultaneously.
This driving method can comprise, at reseting period, will keep sparking voltage and be applied to scanning electrode wire; To go up up voltage and be applied to scanning electrode wire; The decline ramp signal is applied to scanning electrode wire, to reach minimum drop-out voltage; And in the process that applies this decline ramp signal, bias voltage is applied to keeps electrode wires.
Apply this decline ramp signal and can comprise and drop to the described sparking voltage of keeping suddenly, and drop to described minimum drop-out voltage from the described sparking voltage of keeping gradually subsequently.This descends gradually and can be delayed after descending suddenly.
Apply this and keep sparking voltage and can comprise and unexpected the described sparking voltage of keeping is applied to scanning electrode wire, and apply the described up voltage of going up and to comprise the described up voltage of going up is applied to scanning electrode wire gradually.Applying on this up voltage gradually can be delayed after keeping sparking voltage applying this suddenly.
This driving method can comprise that in address period, order applies the scanning high voltage to scanning electrode wire, applies the scanning low-voltage then, and applies the address electrode lines of addressing voltage to selected arc chamber.Can bias voltage be applied in address period and keep electrode wires.Described scanning low-voltage can equal described minimum drop-out voltage.
Description of drawings
Describe exemplary embodiment of the present invention in detail by the reference accompanying drawing, will make clearer above and other feature and advantage of the present invention of those of ordinary skill in the art, wherein:
Fig. 1 illustrates the decomposition diagram of application according to the plasma display of driving method of the present invention;
Fig. 2 illustrates the cross-sectional view that obtains along the II-II line of Fig. 1;
Fig. 3 illustrates the synoptic diagram of the arrangement of electrodes in the stripped display panel of grade shown in Figure 1;
Fig. 4 illustrates the block diagram of the drive unit that embodies driving method of plasma display panel shown in Figure 1;
Fig. 5 illustrates the addressing-display separation driving method as the scanning electrode wire of the example of driving method of plasma display panel shown in Figure 1;
Fig. 6 illustrates the sequential chart that is used to drive plasma display panel driving signal shown in Figure 1;
Fig. 7 is illustrated in the overlapping detailed sequential chart of keeping pulse of the phase of keeping of Fig. 6; With
Fig. 8 is illustrated in the non-overlapped detailed sequential chart of keeping pulse of the phase of keeping of Fig. 6.
Embodiment
At this full content that name of submitting in Korea S Department of Intellectual Property on November 12nd, 2004 is called the korean patent application NO.10-2004-0092357 of " driving method that waits stripped display panel " is incorporated herein by reference.
With reference to the accompanying drawing of exemplary embodiment of the present shown in it the present invention is described more fully below.Yet the present invention can multi-formly embody, and should not be understood that the embodiment that only limits to propose herein.On the contrary, providing these embodiment, is can be fully and fully for the disclosure, and can intactly pass on scope of the present invention to those skilled in the art.In the accompanying drawings, for illustrate clear for the purpose of, the size in layer and zone is amplified.In the whole text, similar Reference numeral is indicated similar element.
Fig. 1 illustrates the decomposition diagram of application according to the plasma display of driving method of the present invention.Fig. 2 illustrates the cross-sectional view that obtains along the II-II line of Fig. 1.
As shown in Figure 1, plasma display 1 can comprise front panel 110 and rear panel 120.Front panel 110 can have prebasal plate 111, and rear panel 120 can have metacoxal plate 121.Plasma display 1 can be included in the barrier 124 between prebasal plate 111 and the metacoxal plate 121.Barrier 124 can be defined for the arc chamber Ce that produces discharge and display image.
Front panel 110 can be included on prebasal plate 111 rear surfaces, to cover scanning electrode wire 112 and the preceding dielectric layer 115 of keeping electrode wires 113.Scanning electrode wire 112 and keep electrode wires 113 and can have respectively by the bus electrode 112a and the 113a that are used to improve electric conductivity that make such as high conductivity material such as metals, and by the transparency electrode 112b and the 113b that make such as ITO transparent conductive materials such as (tin indium oxides).Scanning electrode wire 112 with keep electrode wires 113 and extend along the direction identical with arc chamber Ce.The preceding protective seam 116 of dielectric layer 115 before can on preceding dielectric layer 115, being provided for protecting.
The back dielectric layer 123 that rear panel 120 can comprise metacoxal plate 121 and form on this metacoxal plate 121.Address electrode lines 122 can be disposed in the dielectric layer 123 of back, and extends along the direction perpendicular to scanning electrode wire 112 and address electrode lines 113 bearing of trends.
In the plate 120, can on the dielectric layer 123 of back, provide the barrier 124 that limits arc chamber Ce, and can in the space that is limited by barrier 124, arrange fluorescence coating 125 in the back.In order to protect fluorescence coating 125, can on the surface of fluorescence coating 125, provide back protective seam 128.
Front panel 110 and rear panel 120 can be bondd and mutually by being sealed such as binding elements such as frit (not shown), but are not to be bondd by binding element.When arc chamber Ce was in vacuum state, front panel 110 and rear panel 120 can be by by pressure that vacuum produced and mutual bondings.Can in arc chamber Ce, fill the discharge gas that comprises xenon (Xe), neon (Ne), helium (He) and argon (Ar) or their mixed gas, and this discharge gas comprises about 10% xenon (Xe) gas in mixed gas.
Prebasal plate 111 and metacoxal plate 121 can be made by glass.Prebasal plate 111 can be made by the material with high-visibility.Because metacoxal plate 121 do not need to transmit light,, and be not limited to material with high-visibility so metacoxal plate 121 can be from than selecting the wideer material ranges of the material ranges that is applicable to prebasal plate 111.More expectation has the various materials of high reflectance or minimizing lost work.
In order to improve the brightness of plasma display 1, can on prebasal plate 121 or metacoxal plate 123, form the reflection horizon (not shown), perhaps can comprise reflecting material in the dielectric layer 123, thereby make visible light that fluorescent material sends lateral reflection forward effectively in the back.
Because scanning electrode wire 112 is disposed on the surface of prebasal plate 111 with the transparency electrode 112b and the 113b that keep electrode wires 113, so they must transmit the visible light that is sent by fluorescence coating 125. Transparency electrode 112b and 113b with excellent visibility can be by ITO, SnO 2Or ZnO makes.Owing to address electrode lines 122 can not consider that visibility forms, so address electrode lines 122 can be made and can be by making such as high conductivity material such as Ag, Cu and Cr by the material of extensive selection.Preceding protective seam 116 can be formed on the preceding dielectric layer 115.Preceding protective seam 116 is used to protect preceding dielectric layer 115 and launches secondary electron to promote discharge.
The barrier 124 that is arranged between prebasal plate 111 and the metacoxal plate 121 can be formed, and limits arc chamber Ce together with collaborative prebasal plate 111 and metacoxal plate 121.Fig. 1 illustrates barrier 124 arc chamber Ce is divided into rectangular.Yet arc chamber Ce is not limited to rectangular, but can be divided into various patterns, for example, and honeycomb pattern and Δ pattern.In addition, be rectangle though Fig. 2 illustrates the xsect of arc chamber Ce, the shape of arc chamber is not limited to rectangle.For example, arc chamber Ce can have such as polygons such as triangle, pentagon, circle or elliptic cross-section.
Barrier 124 can be formed on the dielectric layer 123 of back, and can be by comprising that the glass such as the dvielement of Pb, B, Si, Al and O makes.Can be as required with such as ZrO 2, TiO 2And Al 2O 3And so on filling material and such as Cr, Cu, Co, Fe and TiO 2And so on pigment add to the there.Barrier 124 can be protected the space that applies fluorescence coating 125 therein, resists the pressure by vacuum tightness (for example 0.5atm) generation of the discharge gas of filling between plate 110 and the rear panel 120 in front, and prevents crosstalking between the arc chamber Ce.Red, green and blue fluorescence coating 125 can be disposed in the space that is limited by barrier 124, and fluorescence coating 125 can be cut apart by barrier 124.
Fluorescence coating 125 can be by the surface applied fluorescence slurry of dielectric layer 123 backward and barrier 124, and carry out dry run and bake process and form at there, wherein a kind of fluorescent material in red fluorescent material, green fluorescence material and the blue fluorescent material, solvent and cementing agent are mixed to form the fluorescence slurry.The example of red fluorescent material comprises Y (V, P) O 4: Eu, the example of green fluorescence material comprises ZnSiO 4: Mn and YBO 3: Tb, and the example of blue fluorescent material comprises BAM:Eu.
Can on the whole surface of each fluorescence coating 125, form for example back protective seam 128 of MgO.Back protective seam 128 prevents when discharge takes place in arc chamber Ce because the degeneration of the fluorescence coating that the collision of discharge particle causes, and the emission secondary electron is with the raising discharging efficiency.
Fig. 3 illustrates the synoptic diagram of the arrangement of electrodes of plasma display shown in Figure 1.
Referring to Fig. 1 to Fig. 3, scanning electrode wire Y 1, Y 2..., Yn and keep electrode wires X 1, X 2..., X nCan parallel to each otherly arrange.That is to say scanning electrode wire Y 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nCan be arranged in the preceding dielectric layer 115.Address electrode lines A 1, A 2..., Am can be arranged to and scanning electrode wire Y 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nVertically.Arc chamber Ce can be defined as scanning electrode wire Y 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nWith address electrode lines A 1, A 2..., A mThe zone of intersecting.
Fig. 4 illustrates the block diagram of the drive unit that embodies driving method of plasma display panel shown in Figure 1.
Referring to Fig. 3 and 4, the drive unit of this plasma display panel can comprise image processor 400, logic controller 402, Y driver 404, addressing driver 406, X driver 408 and plasma display 1.
Image processor 400 receives such as external image signals such as PC signal, DVD signal, vision signal and TV signal, is digital signal with analog signal conversion, handles this digital signal and the digital signal that will handle is exported as the internal image signal.The internal image signal can comprise red (R), green (G) and blue (B) view data, clock signal and the vertical and horizontal-drive signal that has 8 respectively.
The internal image signal that logic controller 402 receives from image processor 400 is carried out γ correction, automated power control etc., and output addressing drive control signal S A, Y drive control signal S YWith X drive control signal S XThe average signal level (ASL) that logic controller 402 of the present invention detects from the every unit frame of internal image signal.When this average signal level during less than predetermined value, logic controller 402 output drive control signal S XAnd S Y, keep pulse to overlap.When this average signal level is equal to or greater than predetermined value, logic controller 402 output drive control signal S XAnd S Y, to produce the non-overlapped pulse of keeping.
The Y drive control signal S that Y driver 404 receives from logic controller 402 Y, and will have erasing voltage at reseting period (PR among Fig. 6) and be used for the erasing pulse of initialization discharge, will have in address period (PA of Fig. 6) and just scan the high voltage (V among Fig. 6 Sch) and just scanning high voltage by this and change the negative scanning low-voltage (V among Fig. 6 that forms successively Scl) sweep signal and during keeping (PS among Fig. 6) will have and just keep the sparking voltage (V among Fig. 6 s) and the ground voltage (V among Fig. 6 g) keep the scanning electrode wire Y that pulse is applied to plasma display 1 respectively 1, Y 2..., Y n
The addressing drive control signal S that addressing driver 406 receives from logic controller 402 A, and export display data signal the address electrode lines of plasma display 1 in address period (PA among Fig. 6), wherein display data signal is with the addressing voltage (V among Fig. 6 a) be applied to selected arc chamber.Addressing driver 406 (PS among Fig. 6) during keeping applies short pulse.The voltage of this short pulse can be less than or equal to the addressing voltage (V among Fig. 6 a).
X drive control signal (the S that X driver 408 receives from logic controller 402 X), and will have the bias voltage (V among Fig. 6 at reseting period PR and address period PA b) and during keeping, have and just keeping sparking voltage V sWith ground voltage V gKeep that pulse is applied to plasma display 1 keep electrode wires X 1, X 2..., X n
As an example of driving method of plasma display panel shown in Figure 1, Fig. 5 illustrates the addressing-display separation driving method of scanning electrode wire.
Can be divided into a plurality of subdomains referring to Fig. 3 and 5, one unit frame, for example 8 subdomain SF1 ..., SF8, with display gray scale colour code in time-sharing system.Each subdomain SF1 ..., SF8 can be divided into reseting period (not shown), address period A1 ..., A8 and keep during S1 ..., S8.
Each address period A1 ..., A8, display data signal can be applied to address electrode lines A 1, A 2..., A m, and corresponding scanning impulse can be applied to scanning electrode wire Y in proper order 1, Y 2..., Y n
During each is kept S1 ..., S8, can alternately be applied to scanning electrode wire Y with keeping pulse 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nLike this, wherein address period A1 ..., the A8 arc chamber that forms the wall electric charge will produce and keep discharge.
The quantity of keeping pulse in the brightness of plasma display and the unit frame is proportional.When a frame that constitutes piece image was showed by eight subdomains and 256 gray scales, ratio that just can 1,2,4,8,16,32,64 and 128 was kept pulse distribution to these subdomains with different numbers.If show 133 gray scales, then can in SF1, SF3 and SF8, carry out addressing and produce keeping discharge to arc chamber.
The umber of pulse of keeping of distributing to subdomain can determine flexibly according to the weighted value of the subdomain of controlling according to automated power.Distribute to keeping umber of pulse and can considering γ characteristic or panel characteristics and carry out various variations of subdomain.For example, distribute to the gray scale grade of SF4 and can reduce to 6 by 8, and the gray scale grade of distributing to SF6 can rise to 34 by 32.The subdomain number that constitutes a frame can carry out various changes according to design specification.
Fig. 6 illustrates the sequential chart that is used to drive plasma display panel driving signal shown in Figure 1.Fig. 7 is illustrated in the overlapping detailed sequential chart of keeping pulse during the keeping of Fig. 6.Fig. 8 is illustrated in the non-overlapped detailed sequential chart of keeping pulse during the keeping of Fig. 6.
As mentioned above, subdomain SF has reseting period PR, address period PA and keeps period P S.
At reseting period PR, can be at first with ground voltage V gBe applied to scanning electrode wire Y 1, Y 2..., Y nThen, can sparking voltage V will be kept sBe applied to scanning electrode wire Y suddenly 1, Y 2..., Y n, can apply then and have last up voltage V SetThe acclivity signal, make it reach maximum voltage V Set+ V sOwing to apply the acclivity signal that this has not mutated slope, thereby produce weak discharge.Because this weak discharge, and at scanning electrode wire Y 1, Y 2..., Y nNear gather negative charge.Follow scanning electrode wire Y again 1, Y 2..., Y nDrop to and keep sparking voltage V suddenly sThen, apply the decline ramp signal, make it reach minimum drop-out voltage V at there NfOwing to this decline ramp signal with not mutated slope is applied to scanning electrode wire, thereby produces weak discharge.At this scanning electrode wire Y 1, Y 2..., Y nNear the negative charge that gathers because this weak discharge and partly being launched.As a result, at scanning electrode wire Y 1, Y 2..., Y nNear still remain with the many negative charges that are suitable for producing address discharge.The decline ramp signal is being applied to scanning electrode wire Y 1, Y 2..., Y nThe time, can be with bias voltage V bBe applied to and keep electrode wires X 1, X 2..., X nAt reseting period PR, can be with ground voltage V gBe applied to address electrode lines A 1, A 2..., A m
Next, at address period PA, in order to select the arc chamber of display image, can be with scanning high voltage V SchBe applied to scanning electrode wire Y 1, Y 2..., Y n, can will have scanning low-voltage V then SclScanning impulse be applied to scanning electrode wire in proper order.Can will have addressing voltage V according to scanning impulse aDisplay data signal be applied to address electrode lines A 1, A 2..., A mCan be with bias voltage V bBe applied to continuously and keep electrode wires X 1, X 2..., X nAddress discharge can be owing to addressing voltage V a, scanning low-voltage V Scl, the wall voltage that produces because of near the negative charge the scan electrode Y and the wall voltage that produces because of near the positive charge the addressing electrode A carry out.After executing address discharge, positive charge is accumulated near the scan electrode Y, and negative charge then is accumulated in to be kept near the electrode X.
Keeping period P S, logic controller 402 shown in Figure 4 detects the average signal level of each unit frame.When this average signal level during, reach with the rate of rise and to keep sparking voltage V less than predetermined value sAnd reach ground voltage V with descending slope gFirst keep pulse and second and keep pulse and alternately be applied to scanning electrode wire Y respectively 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nFirst keeps pulse and second keeps and has the sparking voltage of keeping V in the pulse sThe interval overlap each other in time.This first keeps pulse and second keeps pulse and is called as the overlapping pulse of keeping.
Describe the overlapping pulse of keeping in detail referring to Fig. 7.From t 1To t 2, be applied to scanning electrode wire Y 1, Y 2..., Y nFirst keep pulse and can the rate of rise reach and keep sparking voltage V sAt this moment, be applied to and keep electrode wires X 1, X 2..., X nSecond keep pulse and can have ground voltage V gFrom t 2To t 4, first keeps pulse can have the sparking voltage of keeping V continuously sFrom t 2To t 3, second keeps pulse can have ground voltage V continuously g, and from t 3To t 4Can the rate of rise reach and keep sparking voltage V sTherefore, at t 4, first keep pulse and second keep pulse have overlap each other in time keep sparking voltage V sNext, from t 4To t 5, first keeps pulse can reach ground voltage V by descending slope gFrom t 4To t 7, second keeps pulse can have the first voltage V sFrom t 5To t 6, first keeps pulse can have ground voltage V gFrom t 6To t 7, first keeps pulse can the rate of rise reach the first voltage V sSecond keeps pulse from t 7To t 8Reach ground voltage V with descending slope g, and from t 8To t 9Can have ground voltage V gThis rate of rise and descending slope are normally used for energy supplement and recovery.
Mean that at the overlapping waveform of keeping period P S being in application to first of scan electrode Y keeps pulse and be applied to and keep second of electrode X and keep and have the sparking voltage of keeping V in the pulse sInterval overlapping.The present invention is not limited in first voltage at t 4Locate overlapping situation, that is to say, first voltage can with the overlapping longer time period of second voltage.This overlapping interval is long more, first keep pulse and second keep the cycle of pulse will be short more, and this interval of keeping between the pulse will be short more.That is to say that when discharge frequency increased, space charge can be utilized more fully in keeping discharge.Therefore, the overlapping discharging efficiency of keeping pulse is better than the non-overlapped discharging efficiency of keeping pulse.
Keep discharge from the angle description of wall electric charge.Keep pulse and have the sparking voltage of keeping V when first sThe time, keep discharge since this be applied to scan electrode Y positive polarity keep sparking voltage V s, be applied to the ground voltage V that keeps electrode X g, the wall voltage that produces because of near the positive charge that accumulates in the scan electrode Y and keep the wall voltage that near the negative charge of electrode X produces and carry out because of accumulating in.Simultaneously, negative charge is accumulated near the scan electrode Y, and positive charge is accumulated in and keeps near the electrode X.
Next, keep pulse and have the sparking voltage of keeping V when second sThe time, keep discharge since this be applied to the positive polarity of keeping electrode X keep sparking voltage V s, be applied to the ground voltage V of scan electrode Y g, keep wall voltage that near the positive charge the electrode X produces and be performed because of accumulating in because of accumulating in the wall voltage that near the negative charge of scan electrode Y produces.Simultaneously, positive charge is accumulated near the scan electrode Y, and negative charge is accumulated in and keeps near the electrode X.These operations can constantly be repeated, and keep discharge thereby carry out continuously.
When by logic controller shown in Figure 4 402 detected average signal levels during, reach with the rate of rise and to keep sparking voltage V more than or equal to predetermined value sAnd reach first of ground voltage Vg with descending slope and keep pulse and second and keep pulse and alternately be applied to scanning electrode wire Y respectively 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nKeeping pulse and second first keeps and has the sparking voltage of keeping V in the pulse sThe interval can not overlap each other in time.This first and second keep pulse is called as the non-overlapped pulse of keeping.
Describe the non-overlapped pulse of keeping in detail referring to Fig. 8.From t aTo t b, be applied to scanning electrode wire Y 1, Y 2..., Y nFirst keep pulse and can the rate of rise reach and keep sparking voltage V s, and be applied to and keep electrode wires X 1, X 2..., X nSecond keep pulse and can have ground voltage V gFrom t bTo t c, first keeps pulse can have the sparking voltage of keeping V s, and second keep pulse and can have ground voltage V gFrom t cTo t d, first keeps pulse can reach ground voltage V by descending slope g, and second keep pulse and can have ground voltage V gFrom t dTo t e, first keeps pulse can have ground voltage V g, and second keep pulse and can the rate of rise reach and keep sparking voltage V sFrom t fTo t g, first keeps pulse can have ground voltage V g, second keeps pulse can reach ground voltage V by descending slope gFirst keeps pulse and second keeps pulse and can be applied to scanning electrode wire Y by repeating aforesaid operations 1, Y 2..., Y nWith keep electrode wires X 1, X 2..., X nThe rate of rise and descending slope are usually as energy supplement and recovery.
Non-overlapped when keeping pulse when applying, keep the cycle stretch-out of discharge, and the frequency of keeping discharge descends.Therefore, the non-overlapped discharging efficiency of pulse of keeping is less than the overlapping discharging efficiency of keeping pulse.Yet when existence was kept pulse in a large number, the overlapping use of keeping pulse can cause temperature to increase and shorten shelf life.
As mentioned above, the present invention has the following advantages.
In the present invention, detect the average signal level (ASL) of every unit frame.When this average signal level during, keep the negligible amounts of pulse less than predetermined value.Therefore, overlappingly keep the pulse temperature that can significantly not raise, and can improve discharging efficiency and brightness.On the contrary, when average signal level during more than or equal to predetermined value, the quantity of keeping pulse increases.Therefore, non-overlapped keeping the serviceable life that pulse can suppress the rising of temperature and prolong plasma display.
Therefore,, can improve discharging efficiency, suppress the serviceable life that temperature raises and prolongs panel according to the present invention.
Exemplary embodiment of the present invention is disclosed herein, although and used concrete wording, they only are used and explain from the general description meaning, and not to be restricted to purpose.Therefore, it should be appreciated by those skilled in the art under the prerequisite of the spirit and scope of the present invention that claim proposed below not deviating from, can carry out various changes in form and details.

Claims (12)

1, a kind of driving method of plasma display panel, in this plasma display panel, scanning electrode wire and to keep electrode wires parallel to each other, and address electrode lines is by with described scanning electrode wire with keep electrode wires and separate and intersect, and this method comprises:
Unit frame is divided into a plurality of subdomains in time;
For each subdomain produce have reseting period, address period and keep during drive signal;
Detect the average signal level of described unit frame;
Alternately keep pulse with first and be applied to scanning electrode wire and second and keep pulse and be applied to and keep electrode wires, wherein each described first is kept pulse and second and keeps pulse and all reach first voltage with the rate of rise, and reaches ground voltage with descending slope; With
When described average signal level during, make described first to keep pulse and described second and keep the period that has described first voltage in the pulse and overlap each other in time less than predetermined value.
2, driving method as claimed in claim 1 further comprises, when described average signal level is equal to or greater than described predetermined value, makes described first to keep pulse and described second to keep the period that has described first voltage in the pulse not overlapping.
3, driving method as claimed in claim 1 further comprises, at reseting period:
To keep sparking voltage and be applied to scanning electrode wire;
To go up up voltage and be applied to scanning electrode wire;
The descending slope signal is applied to scanning electrode wire, to reach minimum drop-out voltage; With
In the process that applies this descending slope signal, bias voltage is applied to keeps electrode wires.
4, driving method as claimed in claim 3 wherein applies described descending slope signal and comprises: drop to the described sparking voltage of keeping suddenly, and drop to described minimum drop-out voltage from the described sparking voltage of keeping gradually subsequently.
5, driving method as claimed in claim 4 further is included in after the unexpected reduction, postpones to descend gradually.
6, driving method as claimed in claim 3 wherein applies the described sparking voltage of keeping and comprises and unexpected the described sparking voltage of keeping is applied to scanning electrode wire, and applies the described up voltage of going up and comprise the described up voltage of going up is applied to scanning electrode wire gradually.
7, driving method as claimed in claim 6 further is included in and applies described keeping after the sparking voltage suddenly, postpones to apply gradually the described up voltage of going up.
8, driving method as claimed in claim 3 further comprises, in address period:
Order will scan high voltage and be applied to scanning electrode wire, apply the scanning low-voltage then; With
Addressing voltage is applied to the address electrode lines of selected arc chamber.
9, driving method as claimed in claim 8 further comprises: in address period described bias voltage is applied to and keeps electrode wires.
10, driving method as claimed in claim 8, wherein said scanning low-voltage equals described minimum drop-out voltage.
11, driving method as claimed in claim 1 further comprises, in address period:
Order will scan high voltage and be applied to scanning electrode wire, apply the scanning low-voltage then; With
Addressing voltage is applied to the address electrode lines of selected arc chamber.
12, driving method as claimed in claim 11 further comprises: bias voltage is applied to the described electrode wires of keeping.
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